<template>
    <el-container >
        <el-header>
           <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
           </div>
           <el-button type="info" @click="loginout">退出</el-button>    
        </el-header>
        <el-container>
            <el-aside :width="isCollapse? '64px':'200px'">
              <el-menu
                background-color="#373d41"
                text-color="#fff" 
                unique-opened 
                :collapse="isCollapse" 
                :collapse-transition="false"	
                active-text-color="#409EFF" router :default-active="activePath"> 
                <div class="toggle-button" @click="toggleCollapse">|||</div> 
                <!-- 一级菜单 -->
                <el-submenu :index="item.id+''" v-for="item in MenuList" :key="item.id">
                  <!-- 一级菜单模板区域 -->
                  <template slot="title" >
                    <i :class="iconsObj[item.id]"></i>
                    <span>{{item.authName}}</span>
                  </template>
                  <!-- 二级菜单 -->
                  <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                    <!-- 二级菜单模板区域 -->
                    <template slot="title">
                    <i class="el-icon-menu"></i>
                    <span>{{subItem.authName}}</span>
                    </template>
                  </el-menu-item>
                </el-submenu>
              </el-menu>  
            </el-aside>
            <el-main>
              <!-- 路由占位符 -->
              <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
  data(){
    return{
      MenuList: [],
      iconsObj: {
        125: 'iconfont icon-yonghuguanli_huaban',
        103: 'iconfont icon-quanxianguanli-',
        101: 'iconfont icon-gouwudai',
        102: 'iconfont icon-dingdanguanli',
        145: 'iconfont icon-icon-test'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }  
  },

  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {   
      // 退出
    loginout(){
      // 清空token
      window.sessionStorage.clear()
      // 跳转登录页
      this.$router.push('/login')
    },
    // 获取菜单数据
    async getMenuList(){
      const { data: res } = await this.$http.get('menus')
      if(res.meta.status !== 200) return this.$message.error('res.meta.message')
      this.MenuList = res.data
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse(){
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath 
    } 
  } 
}
</script>
<style lang="less" scoped>

.el-container{
    height: 100%;
}
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-left: 0;
    >div{
        display: flex;
        align-items: center;
        color: #fff;
        font-size: 18px;
        img{
            margin-right: 20px;
        }
    }
}
       
.el-aside{
  background-color: #333744;
}
.el-main{
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;   
}
.el-menu{
  border-right: 0;
}
</style>
